The "Z"-type trochanteric nailing has been developed  primarily in the surgical care of trochanteric fractures, for some cases of the hip fractures . The system combines the biomechanical advantages of the intramedullary nailing and the traditional, proven dynamic hip screwing. Because of the plenty of length and diameter ranges it can offer an excellent surgical alternative through the upper third of femur fractures, and even for many combinations of the leg fractures. The essential component of the system is that a dynamic hip screw is inserted into the femoral neck. The hip screw is capable of fracture squeezing, but it has a dynamic behavior during the healing. The fixing screw, which is inserted in the nail, ensures both the dynamization and the prevention of the rotation of the hip screw after the surgery. The aiming device is made from a radiolucent material.